The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 21, 2006
Filed:
Dec. 19, 2003
Jiri Ryba, Hubikova, CZ;
Pavel Grasblum, Ruzowa, CZ;
Petr Stekl, Plzen, CZ;
Freescale Semiconductor, Inc., Austin, TX (US);
Abstract
A method and circuit for supplying a variable voltage to an electrical a.c. load (R, L), comprising: a control signal input for receiving a switching control signal to control load output voltage; first and second circuit output terminals (ACL, ACL) for connection to the load; first switch means (S) having an input coupled to the control signal input and having an output coupled between one (ACL) of the circuit output terminals (ACL) and a first a.c. line terminal (AC); second switch means (S) having an input coupled to the first switch means and having an output coupled between the first and second circuit output terminals (ACL, ACL) and coupled to a second a.c. line terminal (AC); and providing a switching control signal to the control signal input to switch the first and second switch means complementarily. The switch means may each comprise a power transistor (Q; Q) and a bridge rectifier (B; B).